package org.apache.lucene.analysis;

/**
 * Copyright 2004 The Apache Software Foundation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import java.io.IOException;

/**
 * Normalizes token text to lower case.
 *
 * @version $Id: LowerCaseFilter.java,v 1.4 2004/03/29 22:48:00 cutting Exp $
 */
public final class LowerCaseFilter extends TokenFilter {
  public LowerCaseFilter(TokenStream in) {
    super(in);
  }

  public final Token next() throws IOException {
    Token t = input.next();

    if (t == null)
      return null;

    t.termText = t.termText.toLowerCase();

    return t;
  }
}